Mathematics 1980 Jamb Past Questions and Answers

Question 31 :

• JAMB 1980

Find the area of the curved surface of a cone whose base radius is 6cm and whose height is 8cm. (take \(\pi\) = \(\frac{22}{7}\))

A. 188.57cm²
B. 1320cm²
C. 188cm²
D. 188.08cm²
E. 10cm²

Question 32 :

• JAMB 1980

Solve the equation for the positive values of \(\theta\) less than 360^o. 3 tan \(\theta\) + 2 = -1

A. 135^o or 315^o
B. 45^o or 135^o
C. 315^o or 180^o
D. 315v + 45^o
E. 360^o or 315^o

Question 33 :

• JAMB 1980

Given log 2 = 0.69, log3 = 1, 10 and log7 = 1.90, all to a fixed base, find log 10.5 to the same base without using tables.

A. 1.03
B. 2.31
C. 3.69
D. 10.5
E. 25

Question 34 :

• JAMB 1980

Simplify 10² + log₁₀5

A. 500
B. 2 log₁₀ 5
C. 10
D. 25
E. Log₁₀5 x 10¹⁰⁰

Question 35 :

• JAMB 1980

Find the missing numerator \(\frac{5}{x + 1}\) - \(\frac{3}{1 - x}\) - \(\frac{7x - 1}{x^2 - 1}\) = \(\frac{?}{x + 1}\).

A. -1
B. X - 1
C. \(\frac{3(1 - 5x)}{x + 1}\)
D. 1
E. 3(1 - 5x)